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Contents of /src/general-info/release-19a.txt

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Revision 1.106 - (show annotations)
Tue Dec 2 17:10:03 2003 UTC (10 years, 4 months ago) by toy
Branch: MAIN
Changes since 1.105: +11 -2 lines
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o C functions in backtrace
o PARSE-INTEGER note removed
o rehash-threshold silently set to a minimum of 0.1
o Sparc port with Cheney GC is deprecated and will go away after the
  next release.
o Some typo fixes.
1 ========================== C M U C L 19 a =============================
5 The CMUCL project is pleased to announce the release of CMUCL 19a.
6 This is a major release which contains numerous enhancements and
7 bugfixes from the 18e release.
9 CMUCL is a free, high performance implementation of the Common Lisp
10 programming language which runs on most major Unix platforms. It
11 mainly conforms to the ANSI Common Lisp standard. CMUCL provides a
12 sophisticated native code compiler; a powerful foreign function
13 interface; an implementation of CLOS, the Common Lisp Object System,
14 which includes multimethods and a metaobject protocol; a source-level
15 debugger and code profiler; and an Emacs-like editor implemented in
16 Common Lisp. CMUCL is maintained by a team of volunteers collaborating
17 over the Internet, and is mostly in the public domain.
19 New in this release:
21 * Feature enhancements:
22 - Stack overflow checking added for FreeBSD/x86, Linux/x86 and
23 Solaris. Code that makes the control stack overflow (for
24 example due to unbounded recursion) will lead to a
25 STORAGE-ERROR being signaled, instead of making CMUCL crash.
26 - LISP:FIND-CLASS and LISP:CLASS-OF now return CLOS classes. The
28 LISP:STRUCTURE-CLASS name CLOS classes. It is no longer
29 necessary to SHADOWING-IMPORT these from PCL when doing MOP
30 programming, and it fixes some non-compliances as well.
31 - Package locks: a package whose EXT:PACKAGE-LOCK is enabled
32 non-NIL is protected against changes in its structure (list of
33 exported symbols, use-list etc). Symbols in a package whose
34 EXT:PACKAGE-DEFINITION-LOCK is enabled are protected against
35 redefinition.
36 - Weak hash tables have been added for x86 systems.
37 - Local functions are now named (FLET <name> ...) or
38 (LABELS <name> ...).
39 - Compiler checking control string and number of args to FORMAT,
40 ERROR and WARN.
41 - TRACE automatically using encapsulation when function-end
42 breakpoints cannot be used.
43 - INSPECT working on CLOS instances.
44 - Callbacks from foreign code to Lisp. Implemented for x86 and
45 sparc.
46 - Functions like GETHASH that are used in the implementation of
47 TRACE can now be traced. See also
49 - New facility for encapsulating functions, FWRAPPERS;
50 see also the CMUCL User Manual.
51 - TRACE and PROFILE have been reimplemented using fwrappers,
52 with the effect of tracing and profiling now working more
53 nicely together.
54 - When a profiled function is redefined, it is re-profiled.
55 - A basic implementation of simple-streams added. Some
56 functionality may be missing.
57 - UNIX:UNIX-LSEEK working with files > 2G on BSDs.
58 - Type declarations on local bindings of special variables no
59 longer being ignored.
60 - DISASSEMBLE disassembling closure/funcallable instance
61 functions.
62 - (SETF EXT:WEAK-POINTER-VALUE) has been added.
63 - CMUCL no longer entering an infinite loop when dumping
64 circular constant lists to fasl files.
65 - COMPILE-FILE-PATHNAME's BYTE-COMPILE keyword arg defaulting
67 - Added VOPs for CHAR=, CHAR<, and CHAR> when the second arg is a
68 constant character.
69 - Added missing VOPs for Sparc for array refs with a constant
70 index.
71 - Lisp binary will also look at the PATH envvar to find out it's
72 own location which is used to find other needed files.
73 - Byte-compiled code being executed ca. 1/3 faster.
74 - Heap overflow checking for x86 and solaris with gencgc. When
75 the heap is close to overflowing, a heap-overflow condition is
76 signaled. If an overflow happens again while debugging the
77 condition, the user is returned to top-level without warning.
78 Use lisp::*reserved-heap-pages* to set the number of pages to
79 reserve.
80 - C functions are displayed in backtraces now for x86/linux and
81 sparc. Previously, it just said "Foreign function call land".
82 (From Helmut Eller.)
84 * Numerous ANSI compliance fixes:
85 - Many bugs in CMUCL's type system detected by Paul Dietz'
86 ANSI test suite have been fixed.
87 - Non-keyword keyword names in lambda lists are now accepted.
88 - Condition slot initialization fixed for the case that two
89 or more slots have the same :INITARG.
90 - Initforms are now evaluated once only during condition slot
91 initialization.
92 - USE-VALUE, STORE-VALUE, CONTINUE behavior corrected in presence
93 of multiple restarts having the same name.
94 - RESTART-CASE's interaction with local macros fixed.
95 - Interaction of COMPUTE-RESTARTS and RESTART-CASE fixed in
96 presence of multiple restarts having the same name.
97 - Condition slot readers/writers are generic functions.
98 - &WHOLE, &REST, &BODY in macro lambda lists can be followed
99 by destructuring patterns. The previous behavior of &BODY
100 when followed by (<body> <declarations> <doc>) is available
101 through the new lambda-list keyword EXT:&PARSE-BODY.
102 - ELT now signals an error in safe code when used on lists
103 with an out-of-bounds index.
104 - Accessing arrays in compiled code with out-of-bounds indices
105 now signals a TYPE-ERROR.
106 - DECLARE no longer being a special operator.
107 - DEFINE-CONDITION accepts slot option :DOCUMENTATION.
108 - Behavior of (... &KEY &ALLOW-OTHER-KEYS) fixed for
109 DESTRUCTURING-BIND and macros.
110 - Stricter checking of keyword argument list in CLOS methods.
111 - &ENVIRONMENT variable bound bound before other vars, regardless
112 of where it appears in a lambda-list.
113 - VALUES types no longer accepting &KEY or &ALLOW-OTHER-KEYS.
114 - THE conforming to ANSI.
115 - SLOT-EXISTS-P can be used with conditions.
116 - REMOVE-METHOD always returning the generic function passed to it.
117 - Standard methods for STANDARD-OBJECT and STRUCTURE-OBJECT
118 defined on MAKE-LOAD-FORM.
120 - DEFSTRUCT recording slot-names as specified by users.
121 - Generic function call keyword argument checking according to
122 ANSI 7.6.5.
123 - CALL-NEXT-METHOD without arguments being called with original
124 arguments when method parameters are changed with SETQ.
125 - When CALL-NEXT-METHOD is called with arguments, an error is
126 signaled in safe code when the set of methods applicable to
127 CALL-NEXT-METHOD's arguments is different from the set of
128 methods applicable to the original method arguments.
129 - FIND-METHOD signaling an error when called with specializers
130 not corresponding to the number of required arguments of the
131 supplied generic function.
132 - TYPE-OF returning KEYWORD for keywords, STANDARD-CHAR for
133 standard characters, BOOLEAN for T, (INTEGER <N> <N>) for
134 integers N, non-list types for functions, and CLOS classes for
135 instances whose class doesn't have a proper name.
136 - Class precedence list of NULL not having SYMBOL before LIST,
137 precedence list of STANDARD-METHOD not having METHOD before
139 - ADD-METHOD returning its first argument, the generic function.
140 - DEFCLASS redefining a class with the given name only if the
141 name is the proper name of an existing class.
142 - KEYWORD package no longer having nickname "".
143 - COMMON-LISP-USER package no longer having nickname USER.
144 - COMMON-LISP package no longer having nickname LISP; LISP
145 and COMMON-LISP are now separate packages.
147 returning values specified by the standard when SLOT-UNBOUND
148 or SLOT-MISSING are called and return.
149 - NTH and NTHCDR accepting bignums as first argument.
150 - First arg of CERROR may be a function.
151 - Lambda-lists of the form (X . Y) in DESTRUCTURING-BIND and macros
152 are now equivalent to (X &REST Y).
153 - LAST, BUTLAST, NBUTLAST accepting bignum counts.
155 - FIXNUM no longer naming a function.
157 - Numerous LOOP fixes.
158 - On FreeBSD, CLtS-required floating-point conditions are signaled.
159 - The minimum rehash-threshold is 0.1, and is enforced silently.
160 This is to prevent overflows and divide-by-zero errors when
161 creating a hash-table with a too-small rehash-threshold.
162 - MACROLET now accepts declarations, as prescribed by ANSI CL.
164 * Numerous bugfixes:
165 - NSET-EXCLUSIVE-OR returns the same results as SET-EXCLUSIVE-OR
166 wrt to duplicate elements.
167 - Forms like (MULTIPLE-VALUE-BIND 'LIST) no longer trapping
168 an internal compiler error when compiled.
170 - Compiler eliminating some type checks in safe code.
171 - Byte-compiler and -interpreter not handling C:&MORE.
172 - Some TYPE-ERRORs being signaled with unbound slots, which
173 made them undisplayable.
174 - Structure predicates no longer signaling an error when applied
175 to obsolete instances.
176 - A DEFTRANSFORM for array bounds checking had an off-by-1 error.
177 - Compiler was not properly deriving the type of FTRUNCATE in all
178 cases.
179 - Fixed error wherein certain uses of 2 arg ATAN caused a
180 compiler error on x86.
181 - Compiler wrongly signaling a type error in VOLATILE-INFO-LOOKUP or
182 COMPACT-INFO-LOOKUP for hash values equal to MOST-POSITIVE-FIXNUM.
183 - FFLOOR and FCEILING return types sometimes being inferred as
184 being the nil type.
185 - PARSE-TIME accepting GMT offsets with a leading plus sign.
186 - UNIX-MMAP not accepting a null fd, preventing anonymous
187 mappings.
188 - SIGPROF having the wrong value on GNU/Linux.
189 - Wrong byte-code being generated for (APPLY #'+ <X> <Y>) and
190 similar cases.
191 - GCD sometimes returning a negative value.
192 - LCM sometimes returning a negative value, or signaling division-by-zero.
193 - FLOAT sometimes returning a float of the wrong type.
194 - ROOM should handle the large heaps now without overflowing
195 internal counters or signaling type errors. Columns should
196 line up better too.
197 - READ-SEQUENCE was returning too soon when reading from files
198 into simple-strings even though there were data available.
200 * Other changes:
201 - CREATE-REQUEST-SERVER has an additional :reuse-address keyword
202 argument.
203 - Removed obsolete alias from MAKE-VECTOR to MAKE-ARRAY
204 - the signature of *COMPILER-NOTIFICATION-FUNCTION* has changed;
205 it now has an extra argument that describes the nature of the
206 error or warning.
207 - File versioning occurs when the version component is :NEWEST,
208 and Emacs style file versions are created: foo.bar.~N~, where
209 the larger N is newer. foo.bar is the newest version.
210 - Converting namestrings to pathnames now get a version component
211 of NIL instead of :NEWEST.
212 - *DEFAULT-PATHNAME-DEFAULTS* has a version component of
213 :UNSPECIFIC instead of :NEWEST so versioning is disabled by
214 default to preserve current behavior. Set the version to
215 :NEWEST to create versions.
216 - LDB backtrace on x86.
217 - DYNAMIC-EXTENT support on x86 and sparc. Stack-allocation can
218 be controlled by the setting of
220 Manual. Be warned that all bets are off if a stack-allocated
221 object or parts of it escape; CMUCL might crash or format your
222 hard disk.
223 - Generational GC (gencgc) available for Sparc/Solaris on an
224 experimental basis. Despite the name and feature, it is not
225 conservative.
226 - Search in /usr/lib/cmucl for the lisp core file as well, to
227 support x86/Linux
228 - The trap for floating-point underflow is turned off by default
229 for all platforms now.
231 * Numerous improvements to the PCL implementation of CLOS:
232 - Gerd's PCL has been added, which fixes numerous bugs and ANSI/
233 AMOP non-compliances, and adds various new optimizations (also
234 see the CMU User Manual).
235 - PCL's class hierarchy has been changed to conform to AMOP, for
236 instance, GENERIC-FUNCTION is now a subclass of
238 - ENSURE-CLASS-USING-CLASS's argument list has been changed
239 to conform to AMOP.
240 - COMPUTE-EFFECTIVE-SLOT-DEFINITION now takes a slot name as
241 argument, for AMOP compliance.
242 - SUBTYPEP works in presence of forward-referenced classes.
243 - Accessing slots of specialized parameters in (SETF
244 SLOT-VALUE-USING-CLASS) methods works.
246 AMOP compliant.
247 - ALLOCATE-INSTANCE working with structures defined with DEFSTRUCT.
249 (FOO 1) now signals an error.
250 - Methods with &OPTIONAL arguments detecting too many args.
251 - DEFMETHOD and DEFGENERIC detecting doubled lambda variables.
253 - SLOT-VALUE, (SETF SLOT-VALUE), SLOT-BOUNDP working with conditions.
254 - (SETF SLOT-VALUE) working on read-only structure slots like
255 in other implementations.
256 - The declaration identifiers SLOTS, AUTO-COMPILE,
257 NOT-AUTO-COMPILE have been moved from PCL to EXT.
258 - Support for inlineing methods in effective methods; see the
259 CMU User Manual.
260 - Wrong results could be returned from generic functions when
261 all methods returned constant values, and some methods were
262 qualified, or the generic function didn't use the standard
263 method combination.
264 - For standard method combination and method combinations defined
265 with the short form of DEFINE-METHOD-COMBINATION: If there are
266 no applicable primary methods when a generic function is
267 called, the generic function PCL:NO-PRIMARY-METHOD is called.
268 The default method of this generic function signals a
269 continuable error of type PCL:NO-PRIMARY-METHOD-ERROR.
270 - Effective methods are no longer precomputed at method load
271 time, if the generic function has more than
272 PCL:*MAX-EMF-PRECOMPUTATION-METHODS* methods (default 100).
273 - The loading of methods with invalid qualifiers no longer
274 signals an error, for standard's conformance. Instead, a
275 warning is printed at method load time. An error is
276 signaled if the generic function is called with arguments such
277 that the method is used.
278 - Redefining a generic function with a different method
279 combination now recomputes effective methods.
280 - Slot access and gf-call optimizations are no longer performed
281 for method parameters being assigned to in a method body, because
282 we can't tell what type of object the method parameter actually
283 contains.
285 * Improvements to Hemlock, the Emacs-like editor:
287 * Changes to rebuilding procedure:
288 - When rebuilding CMUCL, *features* do not need to be set by
289 hand. As files are loaded, the appropriate *features* are set
290 so that the resulting build has the same set of *features*.
291 There should also be fewer warnings about internals.h changing,
292 since that now just contains things in sys:*runtime-features*.
293 Use sys:register-lisp-feature and
294 sys:register-lisp-runtime-feature to set *features* and
295 sys:*runtime-features*, respectively.
296 - Pierre Mai's build-tools have been incorporated. The scripts
297 are in the src/tools directory. These are slightly modified
298 versions of his scripts. Should make building CMUCL easier.
299 * Deprecated features:
300 - EXT:ENCAPSULATE and associated functions; use fwrappers instead.
301 - The sparc port with the Cheney stop-and-copy garbage collector
302 will no longer be supported after this release. The supported
303 GC will be gencgc.
305 This release is not binary compatible with code compiled using CMUCL
306 18e; you will need to recompile FASL files.
308 See <URL:http://www.cons.org/cmucl/> for download information,
309 guidelines on reporting bugs, and mailing list details.
312 We hope you enjoy using this release of CMUCL!

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